Maggie
Toby
Suzanne (as Dee Wallace-Stone)
Mark
Bud
Leon
Joannie
Tina (as Freddie Marie Simpson)
Cheryl
Joy (as Karen Witter)
Dr. Mnesyne
Mr. Davis
Bearded Guy
Landlord / Warden
Two Headed Guy
Hatchethead
Radio Announcer
Lanyard Gates (as Mat Falls)
Gloria Gates (as Cindy Tavares-Finson)
Sarah Gates
Lt. Bradley
Dr. Latimer
Skeeter
Corky
Vernon
Doctor
Judge
Marge
Boy Friend
1st Hood (as George O.)
2nd Hood
3rd Hood
Lab Technician
Scientist
Miner #1
Student in Theatre
Miner #2
Student in Theatre (as Von Von Lindenberg)
Student in Theater
Student in Theatre (uncredited)
Student in Theater (uncredited)